Truncate all tables in a MySQL database in one command?
Drop (i.e. remove tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "drop table $table" DATABASE_NAME; done
Truncate (i.e. empty tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "truncate table $table" DATABASE_NAME; done
truncate multiple database tables on Mysql instance
SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';')
FROM INFORMATION_SCHEMA.TABLES where table_schema in ('db1_name','db2_name');
Use Query Result to truncate tables
Note: may be you will get this error:
ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails
That happens if there are tables with foreign keys references to the table you are trying to drop/truncate.
Before truncating tables All you need to do is:
SET FOREIGN_KEY_CHECKS=0;
Truncate your tables and change it back to
SET FOREIGN_KEY_CHECKS=1;
Use phpMyAdmin in this way:
Database View => Check All (tables) => Empty
If you want to ignore foreign key checks, you can uncheck the box that says:
[ ] Enable foreign key checks
You'll need to be running atleast version 4.5.0 or higher to get this checkbox.
Its not MySQL CLI-fu, but hey, it works!
MS SQL Server 2005+ (Remove PRINT for actual execution...)
EXEC sp_MSforeachtable 'PRINT ''TRUNCATE TABLE ?'''
If your database platform supports INFORMATION_SCHEMA views, take the results of the following query and execute them.
SELECT 'TRUNCATE TABLE ' + TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
Try this for MySQL:
SELECT Concat('TRUNCATE TABLE ', TABLE_NAME) FROM INFORMATION_SCHEMA.TABLES
Adding a semicolon to the Concat makes it easier to use e.g. from within mysql workbench.
SELECT Concat('TRUNCATE TABLE ', TABLE_NAME, ';') FROM INFORMATION_SCHEMA.TABLES